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I <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94,063 <br /> (415) 364-9600 FAX(415) 364-9233 �r <br /> rRESNA,�}�oor,K,:..�.a`'s�4s.d.4.:Wr��S,�Y.�:bvnw��'�.'ae �. " }M.ai�c,xfrr�r�?'^�,,,kv.�c�.>h±5wa�lCaU�h£Oeww`.Sa6o-�Y�.SY.'�.�..rw.�r;sar.�.s:.t. .^•.,.�.E.,rr� `'��x <br /> Cllent Proleci ID W0475,Weber Polnt <br /> 1710 Main Street { <br /> 4 Escalon, CA 95320 <br /> -Attention Tina Le Page DC Sample Group- 208-0716 Reported Aug 11, 1992 <br /> '� .f£`^'xr;.,"z v nr rc.H,.h tr` otJe <uc yjS+rv.,�"r e fi;f7'w v .ir,'w'n� cod'nu` .F.e it.,'�,'^ <br /> A.,.,,.ac.�,�,�uw:.w=,t•.�.,s.,r.��v <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst- J Villar J Villar J Villar J Villar <br /> Reporting Units. pg/L fg/L ug/L pg/L <br /> Date Analyzed- Aug 6, 1992 Aug 6, 1992 Aug 6, 1992 Aug 6, 1992 <br /> CC Sample#- GSU(080692 GBLKa80692 GSLK080692 GBLK080692 <br /> MS/MSD MS/MSD MS/MSO MS/MSD <br /> Sample Conc.: N D N D N D N D <br /> • Spike Cone. <br /> Added: 10 10 10 30 <br /> Conc. Matrin <br /> Spike: 11 11 11 33 <br /> Matrix Spike <br /> % Recovery: 110 110 110 110 <br /> Conc. Matrix <br /> Spike Dup.: 10 10 10 30 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 100 100 100 100 <br /> Relative <br /> %Difference: 95 95 95 95 <br /> SEQUOIA <br /> 5 <br /> SEQUOIA ANALYTICAL %Pacoveryr Conc of M S -Cone of Sample x 100 <br /> Spike Cone Added <br /> QL Relative%Difference Cone of M S -Cone of MSD x 100 <br /> ee (Cone of M S + Cone of MSD)/2 <br /> oject Manager 2080716 WAT <2> <br />